html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: 'Segoe UI', sans-serif;
    background-color: #f2f3f4;
    color: #2c3e50;
    overflow-y: auto;
}

/* ヘッダー */
header {
    background-color: #34495e;
    color: #ecf0f1;
    padding: 15px;
    text-align: center;
    font-size: 1.5em;
}

/* フッター */
footer {
    background-color: #34495e;
    color: #ecf0f1;
    text-align: center;
    padding: 10px;
    font-size: 0.9em;
}

/* メイン */
.main {
    display: flex;
    flex-direction: row;
    padding: 15px;
    gap: 15px;
    box-sizing: border-box;
}

/* グラフ表示領域：60%に変更 */
#graph {
    width: 60%;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* 各グラフ行 */
.graph-box {
    background-color: #ffffff;
    padding: 10px;
    border-radius: 10px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    height: 150px;
    box-sizing: border-box;
    overflow: hidden;
}

/* グラフ描画部 */
.graph-canvas {
    width: 100%;
    height: 100%;
}

/* Canvas設定 */
canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
}

/* ナビゲーター：40%に拡大 */
#navigator {
    width: 40%;
    background-color: #e8eaf6;
    padding: 10px;
    border-radius: 10px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    box-sizing: border-box;
}

/* ==== Login Page Styles ==== */

.login-container {
    width: 100%;
    height: calc(100vh - 100px);
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-box {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    width: 300px;
}

.login-box h2 {
    margin-top: 0;
    text-align: center;
    color: #34495e;
}

.login-box label {
    display: block;
    margin-bottom: 12px;
    color: #2c3e50;
}

.login-box input {
    width: 100%;
    padding: 8px;
    box-sizing: border-box;
    border: 1px solid #ccc;
    border-radius: 6px;
    margin-top: 4px;
}

.login-box button {
    width: 100%;
    padding: 10px;
    background-color: #34495e;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
}

.login-box button:hover {
    background-color: #2c3e50;
}

.error-msg {
    color: red;
    margin-bottom: 10px;
    text-align: center;
}